For a hard core hard on, there is no better erection enhancer than the triple helix Cock Cage. Designed to fit around your cock and balls, this will harness your erection and keep you up as long as you please. Easily sized to fit your penis, it also features a quick release system to let you down when you are ready to call it quits but not a second before! Trim to fit quick release 3 ring erection enhancer. Materials Rubber 2 inches small ring, 2.25 inches medium ring, 2.5 inches large ring.